You will have to call Dell tech support and after verifying ownership, they can help you unlock the BIOS.

https://www.dell.com/community/Laptops-General-Read-Only/Forgot-Unlock-Setup-Password/td-p/4207863

That was indeed sheer luck. Glad to see it worked out.

I really need help I’ve been  stuck at password at startup , for 4 months I’ve been trying everything but still locked out , why for no apparent reason it has to have a password that I didn’t put

Read my reply above please. You will have to call Dell tech support for your region and after confirming that you are the owner, they will help you unlock the system.

https://www.dell.com/community/Laptops-General-Read-Only/Forgot-Unlock-Setup-Password/td-p/4207863

I have tried calling Dell twice already. The password they gave me doesn't work. I can't believe Dell would restrict their users this much.

I didn't get any error code while trying to remove setup locked bios password. What can i do to remove this password? 

How to Bypass or Remove a BIOS Password by Removing the C.M.O.S Battery:

The simplest way to remove a BIOS password is to simply remove the C.M.O.S battery. A computer will remember its settings and keep the time even when it is turned off and unplugged because these parts are powered by small battery inside the computer called a C.M.O.S battery. If we pull out this battery, the computer will forget a lot of its hardware settings, including its BIOS password. This should not be performed on Laptops if you are not experienced working with laptop hardware.

Finding the C.M.O.S Battery:

Anyway, open up the computer case using a screw driver and locate the flat, circular and metallic C.M.O.S battery. It should look something like the picture to the right. Some computers have this part standing upright. Once you have located it, observe how the latches are holding it. There are many different ways to remove a C.M.O.S battery but the most common way on newer computers can be seen in the picture below. Removing the C.M.O.S Battery Make sure to power down the computer, unplug the power cables and unplug any USB devices if they are powered. The computer must not be able to get power from anywhere for this to work. Take out the C.M.O.S battery and wait 10 – 25 minutes before putting it back in. The reason for this wait is because the computer can still store power in its capacitors even though everything is unplugged. The waiting period allows enough time for them to discharge. Plug everything back in, power up the computer and enter the BIOS again. If everything went well there should be no more password. In some cases, if you get weird error messages during boot up now, you will need to go to “Load BIOS Defaults” in BIOS and save the changes to fix them.

You could also remove the password jumper on the motherboard and put it on the CMOS reset Jumper and you will find you BIOS password has been removed. 

Not on a notebook it won't - Dell notebooks  store the password in EPROM.